A picture of A.D. 31 Passover
calendar shows it was on a Tuesday or possibly Wednesday, (The Crucifixtion), but not
Scripture states it was the preparation day, or the 6th day of the Biblical week. Passover occurs of course on the 14th day of the moon, or rather the night following the 14th day (light portion) of the moon.
This calendar shows New Moon to be on the 10th day of the pagan calendar, meaning the 14th day, Passover, is on the 24th or 25th day of the pagan calendar.